The change in internal energy when 1.0 mol calcite converts to aragonite at a pressure of 1.0 bar is +0.21 kJ. Densities of calcite and aragonite are 2.71 g/cm3 and 2.93 g/cm3, respectively. Calculate: i) the difference between the enthalpy change. ii) the change in internal energy.

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Chapter6: Thermochemistry
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The change in internal energy when 1.0 mol calcite converts to aragonite at a pressure of 1.0 bar is +0.21 kJ. Densities of calcite and aragonite are 2.71 g/cm3 and 2.93 g/cm3, respectively. Calculate:
i) the difference between the enthalpy change.
ii) the change in internal energy.

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